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Technical Drawings

The schematics provide technical installation drawings for inverter/battery power backup systems at health clinics in Haiti.

If you have a diagram you would like to share please email it to USAID for consideration.

In addition, the following briefly captures the technical details for major components of the installed power backup systems:

Inverter

• Three units of 3.6 kW, 48VDC inverter/45 Amp Charger.
• Outback inverters utilizing the FlexWare DC and AC boxes.
• AC and DC circuit breakers as part off the Outback Flexware System
• Equipment enclosure.
• The surge protection adder
• Additional kilowatt meters for the AC IN and AC OUT feeders.
• Supplemental DC Smart charging for some sites.
• An alarm system producing sound and light when the batteries are in need of charging, and before the low voltage disconnect takes over.

Battery

• 48V battery bank of (a) 900 to 1,000 Ah or (b) 1200 to 1300 Ah or (c) 660 Ah
• Batteries installed on welded metal racks, painted, with wood shelves and in secure locations.
• Homerun battery cables – 2 sets of 4/0 (2-Positive and 2-Negative) along with paralleling cables of exact same length for complete circuit from the positive bus to the negative bus.
• Deep Cycle batteries with maximum of 4 parallel strings and 50% depth of discharge.
• Battery paralleling connections on a common bus bar.
• Bidder will complete an initial full charge of the batteries, and assure that all of the batteries’ water levels are topped off following this charge. Sufficient distilled water will be included in this proposal to be left with the operator to last for the first 6 months of operation.

Wiring

• AC IN wiring in EMT conduit. AC OUT circuits cabled with 100% new and separate from any existing circuits. Also, the AC OUT circuits (with some exceptions) run in EMT conduit.
• The new outlets and conduit feeding the outlets are identified differently from the main building circuits, by a different color paint and signage.
• All wiring run in conduit and wire except for the battery cables.
• All conduits are fastened to junction boxes, panel boards, circuit breakers, etc.
• Grounding, conduit and wire installation in accordance with the 2008 National Electrical Code.